Pro-View Video Transmitter
The Pro View wireless DSLR transmitter is not quite ready for movie mode just yet. The transmitter is outfitted to work with the viewfinder and not the LCD on the back of the camera. I spoke with Mark yesterday, and they are thinking of making a version that can adapt to the on camera monitor in Live View mode.
The site claims that the transmitter works within 500 feet, and is expandable to show 4 cameras on one monitor. Â The Low resolution of the monitor may present some issues, but to have a tool like this available to mount the camera wherever you want could be invaluable for specific shots. Multi Cam, Jib arm, Car mounts, you name it. Check it out Here.